Controlling Redox Status for Stem Cell Survival, Expansion, and Differentiation

Area of Science:

• Cell Biology
• Stem Cell Biology
• Biochemistry

Background:

• Reactive oxygen species (ROS) were traditionally viewed as pathological agents causing cell death.
• Emerging evidence indicates physiological ROS levels act as crucial secondary messengers in stem cell functions.
• Stem cells are vital for regenerative medicine, drug discovery, and disease modeling, necessitating optimized culture methods.

Purpose of the Study:

• To review the dual role of ROS in stem cell biology, focusing on self-renewal, proliferation, and differentiation.
• To explore how microenvironmental factors regulate endogenous ROS production in stem cells.
• To emphasize the need for precise ROS quantification for controlled stem cell fate.

Main Methods:

• Literature review focusing on mesenchymal stem cells (MSCs) and pluripotent stem cells (PSCs).
• Analysis of studies investigating ROS signaling in stem cell maintenance and function.
• Discussion of microenvironmental influences (organizational, metabolic, mechanical) on ROS generation.

Main Results:

• Physiological ROS levels are essential for mediating stem cell functions, challenging the view of ROS as solely detrimental.
• The stem cell microenvironment, encompassing cell organization and metabolic/mechanical cues, can be modulated to control ROS levels.
• Mesenchymal stem cells (MSCs) and pluripotent stem cells (PSCs) exhibit distinct ROS-dependent regulatory mechanisms.

Conclusions:

• ROS play a critical role in maintaining stem cell identity and function, acting as signaling molecules.
• Regulating the stem cell microenvironment offers a promising strategy for controlling endogenous ROS and optimizing stem cell behavior.
• Accurate quantification of ROS is essential for precise control over stem cell fate and successful clinical translation.